Cutting a 2 (5 cm) aluminum plate requires a(n) _____.
a. low gas flow rate
b. high-cutting amperage
c. low-cutting amperage
d. oxygen/air plasma/shield gas combination
[Ques. 2] Most heavy-duty plasma arc cutting systems require one gas cylinder containing the cutting gas and another
containing _____.
a. shielding or cooling gas
b. water vapor
c. acetylene
d. a mixture of cutting gas and shielding gas
[Ques. 3] Industrial plasma cutting units can cut carbon steel up to _____.
a. 1 thick
b. 3 thick
c. 5 thick
d. 7 thick
[Ques. 4] The typical plasma arc cutting torch contains a _____.
a. deflector, retaining cup, extended nozzle, and extended electrode
b. gouge shield, retaining cup, gouging nozzle, and standard bronze electrode
c. deflector, gouge shield, retaining cup, and copper electrode
d. retaining cup, copper electrode with a hafnium or thoriated tungsten insert, gas swirl ring, and nozzle
[Ques. 5] Which of the following safety statements related to plasma arc cutting is true?
a. A hot-work permit is not required for plasma arc cutting due to the nature of the process.
b. Both methane and propane are lighter than air and rise quickly from the work area if released.
c. Never carry matches or gas-filled lighters in your pockets.
d. Unlike oxyfuel cutting, a vessel can be cut safely with plasma regardless of its contents.
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